java-native-interface Questions
3
Solved
I'm trying to call a java method from native C code in an Android Application. This sounds quite simple with the usage of JNI, but my code always crashes when finally calling the method itself.
Her...
Unreflective asked 23/9, 2011 at 14:44
3
Solved
Is it possible to add a new path for native libraries at runtime ?.
(Instead of starting Java with the property java.library.path), so a call to System.loadLibrary(nativeLibraryName) will include ...
Hydrothermal asked 14/3, 2013 at 12:23
9
Solved
I am tracking down crashes with our Android application (which uses the NDK to load a custom C++ library) using a crash reporting service. A small number of users are experiencing the following cra...
Sheathe asked 20/2, 2015 at 21:48
7
Solved
Is it possible to initialize Java system properties using some sort of configuration file?
(ie: can you set java.library.path using a file inside your jar)
EDIT: Clarification: I am asking sp...
Babylonian asked 18/7, 2011 at 16:36
2
Solved
I am trying to compile the following code:
https://android.googlesource.com/platform/packages/inputmethods/LatinIME/+/master
into an apk file.
To do this,
I created a default Android project wi...
Philipps asked 27/8, 2018 at 20:48
2
Solved
I have a .aar including some native .so. Andrid project B implements this .aar like:
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation(name: 'abcd', ext:'aar...
Cerargyrite asked 24/5, 2021 at 13:6
4
Solved
All I'm trying to do is generate a JNI Header file using JDK Javah.exe program, but no matter what I try I keep getting the error message "Error: could not find class file for 'ddg.ndkTest.NativeLi...
Devine asked 3/7, 2012 at 14:22
3
Solved
I'm developing an Android application that relies on FFmpeg to retrieve audio metadata. I know it's possible to retrieve album art programmatically using FFMpeg. However, once you have decoded the ...
Ljoka asked 27/11, 2012 at 20:44
2
Solved
I have an android_library.aar file that containing library.so and some other resources and java files.
I imported android_library.aar to my project. My project uses c++ code with NDK. My problem i...
Argue asked 20/8, 2018 at 12:31
12
Solved
In Ubuntu 12.04, I have jdk7 from sun/oracle installed. When locate jni.h, it prints multiple locations
/usr/lib/jvm/java-6-openjdk-amd64/include/jni.h
/usr/lib/jvm/jdk1.7.0_07/include/jni.h
...
...
Biomedicine asked 25/1, 2013 at 20:19
2
Solved
Background:
I've decided that since bitmaps take a lot of memory which can cause out-of-memory errors easily, I will put the hard, memory consuming work on C/C++ code .
The steps I use for rotat...
Thermodynamics asked 18/1, 2013 at 12:10
4
Solved
I'm trying to use someone else's Makefile to complile a very simple c++ library. The makefile is as follows:
JNIFLAGS=-O2 -pthread -I/usr/lib/jvm/java-6-sun/include -I/usr/lib/jvm/java-6-sun/inclu...
Frontpage asked 18/1, 2010 at 12:49
4
Solved
JAVA Code
boolean b = invokeNativeFunction();
int i = invokeNativeFunction2();
C code
jboolean Java_com_any_dom_Eservice_invokeNativeFunction(JNIEnv* env, jobject obj) {
bool bb = 0;
...
ret...
Museology asked 13/1, 2015 at 15:6
8
Solved
At the moment, i'm trying to create a Java-application which uses CUDA-functionality. The connection between CUDA and Java works fine, but i've got another problem and wanted to ask, if my thoughts...
Guaranty asked 27/10, 2009 at 17:22
5
Desired output examples:
(Lorg/w3c/dom/Node;)Lorg/w3c/dom/Node;
(Ljava/lang/String;)Lorg/w3c/dom/Attr;
Such signatures can be generated using javap utility:
javap -s -p org.w3c.dom.Node
But i...
Claytor asked 16/12, 2010 at 2:11
5
I am working on a Java application for solving a class of numerical optimization problems - large-scale linear programming problems to be more precise. A single problem can be split up into smaller...
Retrospection asked 14/11, 2019 at 20:29
2
Solved
I have an Android app that uses some JNI code. Long story short (pun intended), it is nearly impossible to convert the JNI libraries to 64-bit as it would require a lot of changes. The code (both J...
Declare asked 16/5, 2016 at 4:38
2
Solved
I'm having some trouble with native code using JNI and I suspect that this is maybe due to a call to setRequestedOrientation().
What happens to the activity when I call setRequestedOrientation()? ...
Helban asked 16/10, 2015 at 14:38
3
Solved
In my AndroidStudio project I created native library using JNI with CMake and CPP code. Everything builds and runs OK, but when I try to commit and push my code to git, the CodeAnalysis appears in ...
Footslog asked 24/1, 2022 at 20:27
42
Solved
Consider:
public class LoginCumReg implements ActionListener, KeyListener {
private JFrame form;
private JTextField txtunm;
private JTextField txtnm;
private JTextField txteml;
private JButto...
Devolution asked 13/3, 2014 at 14:9
2
Solved
So, I'm attempting to call the Linux C - stat function.
My JNA code:
public int stat(bap path, bap statdump);
the bap class:
public static class bap extends Structure {
public byte[] arr...
Shroud asked 25/4, 2015 at 3:10
4
Solved
Like the title says - how to add native code to existing Android Studio project, without breaking the current project, including gradle and proguard settings?
Colorless asked 15/7, 2017 at 12:22
11
Solved
I'm using Opencv sdk for Android to develop a real time processing and matching.
The main Opencv traitment logic is in a JNI function.
The problem is that sometimes (just sometimes) my app crashe...
Mata asked 22/4, 2019 at 13:18
16
Solved
What is wrong with my make file?
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := foo
LOCAL_SRC_FILES := foo.c
LOCAL_EXPORT_LDLIBS := -llog
include $(BUILD_SHARED_LI...
Missioner asked 15/12, 2010 at 23:15
5
Solved
Now i create a new project include c++ support in Android Studio 3.2, it has native-lib.cpp naturally, the CMakeLists.txt looks like this:
add_library( # Sets the name of the library.
native-lib
...
Wanhsien asked 23/10, 2018 at 15:1
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